Why do cats like milk?

The fat in milk is what cats like. Whole milk contains 3.5% butterfat (fatty part of milk) content. Cats like cream as well and medium cream contains 25% butterfat. Fats are part of a cat's diet. They provide energy. The average man has up to 24% fat in his body. Men are mammals. Mice are mammals. I can't find a figure for the percentage of fat in mice but it would be similar to humans, I would have thought. So mice, the primary prey of the domestic cat, has lots of fat in it. Cats like fat and like milk because of that.

Also milk is the kitten's food source immediately after birth. There must be a connection there because we keep adult cats in a state of kitten-hood due to the fact that we provide for them in every aspect of their nutrition. A cat is drinking mother's milk even when she is 15 years of age!

I realise that mother's milk (colostrum) is not supermarket milk but there are great similarities. The problem is that most cats are lactose intolerant (due to insufficient lactase) because the milk at supermarkets is cow's milk. We, too, can be lactose intolerant. Have you tried drinking lactose free milk or soya milk to see if it improves your health? We are not cows.....